HNoMS Olav Tryggvason

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Norwegian minelayer Olav Tryggvason Olav Tryggvason in her pre-war role as a training ship
Career (Norway)
Name:	Olav Tryggvason
Builder:	the Royal Norwegian Navy's shipyard at Horten
Launched:	21 December 1932
Commissioned:	21 June 1934
Decommissioned:	9 April 1940
Fate:	Wrecked in Royal Air Force bombing raid on Kiel 3 April 1945
General characteristics
Displacement:	1,596 tons standard 1,860 tons in German service[1]
Length:	97.3 metres (319.23 ft)
Beam:	11.45 metres (37.57 ft)
Draft:	3.5 metres (11.48 ft)
Propulsion:	Two De Laval turbines with 4,600 hp and two Sulzer Marsch eight cylinder diesel engines of 1,400 hp
Speed:	20 knots (37.04 km/h)
Range:	3,000 nautical miles (5,556.00 km) at 14 knots (25.93 km/h)
Complement:	175 men
Armament:	As built: 4 × 12 cm (4.72 inch) Bofors guns[2] 1 × 76 mm (3 inch) AA gun 2 × 12,7 mm Colt anti-aircraft machine guns 4 × 46 cm torpedo tubes 280 mines After 1943 rebuild:[3] 3 × 10,5 cm guns 2 × 3,7 cm anti-aircraft guns 10 × 2 cm anti-aircraft guns 4 × 46 cm torpedo tubes 280 mines
Notes:	All the above listed information, unless otherwise noted, was acquired from [4]

The minelayer HNoMS Olav Tryggvason was built for the Royal Norwegian Navy by the naval shipyard at Horten in the early 1930s and had build number 119.^[5] She was considered a well armed and balanced ship, with an engine plant consisting of both steam turbines and diesel engines. Olav Tryggvason was the first Norwegian warship equipped with a basic gun computer, allowing all four main guns to be fired at the same time at one target with some degree of accuracy.^[2]

She also served as a cadet training ship in the summer season, taking aboard 55 cadets and showing the flag around Western Europe on training cruises.^[6]

Contents 1 Name 2 City of Flint incident 3 Battle in Horten harbour 4 German service 4.1 Western Europe 4.2 Northern Baltic 4.3 Norway and the North Sea 4.4 Back to the Baltic - Operation Hannibal 4.5 Destruction 5 See also 6 Footnotes 7 Literature 8 External links

[edit] Name

She was named after Olaf I of Norway, who was king of Norway roughly 995 to 1000.

[edit] City of Flint incident

At the outbreak of World War II, the Olav Tryggvason took part in neutrality protection duties. Her first armed action came on 3 November 1939,^[7] when the US merchant ship City of Flint entered Norwegian territorial waters. The City of Flint had been taken as a prize by the German pocket battleship Deutschland in the Atlantic and was on its way to Germany with the American crew as prisoners. According to public international law, the ship could have passed through Norwegian waters without interference, but when she stopped and anchored in the port of Haugesund, the Germans broke Norwegian neutrality regulations.^[7] The Olav Tryggvason was dispatched and boarded the City of Flint with one officer and thirty armed sailors, who returned control of the ship to the American captain, Joseph H. Gainard, on 6 November. He unloaded his cargo in Bergen and set sail in ballast for the US. The German prize crew was interned at Kongsvinger Fortress. In response, the Norwegian Ministry of Foreign Affairs received several strong worded and threatening notes from its German counterpart.

[edit] Battle in Horten harbour

The Olav Tryggvason was at Horten for minor engine repairs,^[8] manned only by a skeleton crew, when the Germans invaded on 9 April 1940. Along with the minesweeper HNoMS Rauma, she defended the harbour against the German torpedo boats Albatros and Kondor, and the small räumboot minesweepers R 17 and R 27.^[9][10]

The minelayer's commander, kommandørkaptein T. Briseid, had received warning of the intruding foreign naval forces and at 0215 hrs anchored his ship to a buoy in the inner harbour to cover the harbour entrance with her guns.^[11] At 0435 hrs two ships with no lights entered to harbour. At a range of 60 m the Reichskriegsflagge was spotted and the ships identified as German. Much of the Norwegian defensive advantage was however lost as Briseid then decided to continue following neutrality protection guidelines and first blew a steam horn, then fired a blank shot, then two live warning shots at the foreign warships before opening up on them in earnest.^[11]

During the confusing battle at close range, R 17 was sunk by the Olav Tryggvason's 12 cm guns off Apeneskaia quay. Of the forty-five strong German landing unit on board R 17, only fifteen made it ashore unwounded. Despite the best efforts of the Norwegian ships, the R 27 managed to get to the cover of a peninsula and land her force of forty-five infantry in the harbour, having suffered several hits in the process. After landing her infantry the R 27 ran aground, then dislodged herself and suffered more hits before making her escape from the area. At the same time as the German minesweepers made their charge into the harbour, the Albatros tried to engage the Norwegian ships, but suffered hits from Olav Tryggvason and was forced to take cover behind some nearby islands.^[12] The cruiser Emden also tried to interfere from a distance out in the Oslofjord, but without result.^[13][14]

At 0735 hrs, after threats of aerial bombardment of the naval base and the adjacent city, as well as a misguided impression of the size of the 60-strong German landing force, the Norwegian land and naval forces surrendered. During the battle Olav Tryggvason fired almost sixty 12 cm shells^[15], suffered at least thirty-five hits from the 20 mm guns aboard the räumboots and had two sailors wounded.^[16]

[edit] German service

The Olav Tryggvason was taken into the Kriegsmarine and renamed Albatros II on 11 April, to commemorate the torpedo boat she had damaged. Five days later, on April 16, she was renamed again, as the Brummer, after an artillery training ship torpedoed in the Kattegat 14 April 1940.^[3]

After capture the ship was rearmed with new main and secondary guns. Her original four 12 cm main guns were at first stored by the Germans before being installed in a coastal artillery battery at Hundvåg in Vestlandet in May, 1945, only days before VE day.^[17]

[edit] Western Europe

Brummer spent her first year as a Kriegsmarine minelayer on the coasts of the Netherlands and Belgium as part of the naval contingent for the planned invasion of England.^[3]

After the cancellation of the invasion of the UK she was transferred to the Baltic Sea in time to participate in Operation Barbarossa, carrying out mining operations in the Gulf of Finland.^[3]

[edit] Northern Baltic

Brummer arrived at Utö in Finland together with the German minelayers Tannenberg and Hansestadt Danzig on 14 June, 1941, and was concealed in the Nauvo area in preparation for the outbreak of war eight days later.^[18]

On 22 June the minelayers, designated Mine Group Nord, laid a minefield in the Gulf of Finland, west of Hanko.^[19] The mine barrage, codenamed Apolda,^[20] channelled shipping in the Gulf either to the north, within reach of Finnish coastal artillery, or to the south, where German guns were in range.^[19] For most of the mining operation, which was initiated in the early hours of the day, the minelaying group worked unchallenged even though the ships were spotted by Soviet naval forces. Only at 0228 hrs did Brummer and an escorting Schnellboot came under unsuccessful attack from two Soviet Beriev MBR-2 flying boats. The attack on Brummer was the first engagement between the Baltic Fleet and German forces during World War II.^[20]

In addition to forcing Soviet shipping into vulnerable bottlenecks, Brummer's mines accounted for the loss of a Soviet submarine. On 1 July the Baltic Fleet M class submarine M-81 struck one of the mines laid by Brummer^[21] and sank off the island of Vormsi in Estonia.^[22]

Of the total of six German-controlled minelayers operating in the Northern Baltic Sea and the Gulf of Finland in 1941-1942 Brummer was the only vessel purpose-built for minelaying.^[1]

Amongst the operations that Brummer took part in while stationed in the Baltic was the joint German-Finnish Operation Nordwind in September 1941, a naval deception operation to divert Soviet attention from the German landings on the Estonian islands Hiiumaa and Saaremaa. Brummer was part of the German contingent in the operation's II Group. The operation was meant to be carried out by a diversionary naval manoeuvre during daytime on 13 September, with the force turning back towards their base at Utö by 2030 hrs. In the end the operation failed to attract Soviet interest and saw the loss of the Finnish coastal defence ship Ilmarinen to naval mines.^[23]

[edit] Norway and the North Sea

After spending close to a year in the Baltic she was again deployed in Western Europe, serving between 1942 and 1944 mainly in the North Sea and off Norway.^[3]

[edit] Back to the Baltic - Operation Hannibal

In 1944 Brummer resumed mining operations in the Baltic. She was used for mining until the spring of 1945 when she was employed as part of the armada that evacuated German troops and civilians from the path of the Red Army.^[3]

[edit] Destruction

The end of Brummer came on 3 April 1945, when she was wrecked by RAF bombers while dry docked for repairs at the Deutsche Werke shipyard in the Baltic port of Kiel.^[3]

After the war, the wreck was scrapped between 1945 and 1948.^[3]

[edit] See also

• List of World War II ships

[edit] Footnotes

[edit] Literature

• Abelsen, Frank: Norwegian naval ships 1939-1945, Sem & Stenersen AS, Oslo 1986 ISBN 82-7046-050-8 (English)&(Norwegian)
• Berg, Ole F.: I skjærgården og på havet - Marinens krig 8. april 1940 - 8. mai 1945, Marinens Krigsveteranforening, Oslo 1997 ISBN 82-993545-2-8 77 (Norwegian)
• Fjeld, Odd T. (ed.): Klar til strid - Kystartilleriet gjennom århundrene, Kystartilleriets Offisersforening, Oslo 1999 ISBN 82-995208-0-0 (Norwegian)
• Johannesen, Folke Hauger: Gå på eller gå under, Faktum Forlag AS, Oslo 1988 ISBN 82-540-0113-8 (Norwegian)
• Kristiansen, Trond: Fjordkrigen - Sjømilitær motstand mot den tyske invasjonsflåten i 1940, Forlaget Kristiansen, Harstad 2006 ISBN 82-997054-2-8 (Norwegian)
• Sivertsen, Svein Carl (ed.): Sjøforsvaret dag for dag 1814-2000, Sjømilitære Samfund ved Norsk Tidsskrift for Sjøvesen, Hundvåg 2001 ISBN 82-92217-03-7 (Norwegian)

[edit] External links

• Naval history via FLIX: KNM Olav Tryggvason, retrieved 15 March 2006 (English)
• Ships of the Norwegian navy, retrieved 15 March 2006 (English)
• The Invasion of Norway (Operation Weserübung), by Mike Yaklich, Jason Pipes, and Russ Folsom, retrieved 15 March 2006 (English)
• A russian site with phots and drawings of Olav Tryggvason (Russian)

v • d • e Norwegian minelayers Glommen class: Glommen, Laugen Frøya Olav Tryggvason Vale (N53) Gor class: Brage, Gor, Uller, Tyr Formerly US Navy Auk class Minelayers of the Royal Norwegian Navy